As a television journalist was trying to record video of a protest in Hong Kong last week, the protest suddenly became about him — and his employer. Surrounding him, the young demonstrators waved signs in front of his camera that read “Change channels!” They also held up bottles of Pocari Sweat, a sports drink that has become an unlikely symbol of disdain for his news station, Television Broadcasts, better known as TVB. TVB, Hong Kong’s dominant broadcaster, has been singled out for scorn by protesters, who accuse it of a pro-Beijing bias in its coverage of the political crisis roiling this semiautonomous Chinese region. Analysts say TVB’s reporting has largely focused on how the protests have disrupted Hong Kong’s famed efficiency, while playing down the political frustrations that have driven people to the streets in large numbers. The tension between the demonstrators and the station, whose broadcasts reach about 70 percent of Hong Kong’s population, touches on concerns that the city’s status as a regional bastion for press freedom is being steadily undermined by the Communist Party in China, where media controls are strict. “It is a notorious television station and it always doesn’t show comprehensive facts,” said Cheuk Ka-ho, 21, a university student who is active in the protest movement. “We feel that over the years it has gotten worse as it keeps getting closer to China.” The protests began in early June, when hundreds of thousands marched against legislation that would allow extradition to the Chinese mainland. Hong Kong’s leader, Carrie Lam, has since suspended the bill indefinitely, but protesters, including on Sunday, have continued to demand its full withdrawal, Mrs. Lam’s resignation and an independent inquiry into what they consider a brutal police response to some of the protests.